OK so is there a size difference between these lenses?

Leica 35mm f3.5 Summaron
Canon 35mm f2.8
Nikon 35mm f3.5/f2.5
Cosina 355mm f2.5

I believe the Leica 35mm f3.5 Elmar is the smallest but the Summaron is technically better (although some may argue). I'm reading up on the optics and all that stuff but size-wise is any of these larger than the other? They look similar but I just wanted to check.